Please use this identifier to cite or link to this item: https://ahro.austin.org.au/austinjspui/handle/1/9440
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dc.contributor.authorPaizis, Georgina-
dc.contributor.authorCooper, Mark E-
dc.contributor.authorSchembri, Josefa M-
dc.contributor.authorTikellis, Christos-
dc.contributor.authorBurrell, Louise M-
dc.contributor.authorAngus, Peter W-
dc.date.accessioned2015-05-15T22:32:15Z
dc.date.available2015-05-15T22:32:15Z
dc.date.issued2002-11-01-
dc.identifier.citationGastroenterology; 123(5): 1667-76en_US
dc.identifier.otherPUBMEDen
dc.identifier.urihttps://ahro.austin.org.au/austinjspui/handle/1/9440en
dc.description.abstractAngiotensin II (ANG II) has profibrotic actions in the heart and kidney, whereas blockade of the renin angiotensin system (RAS) attenuates injury. This study examines whether the RAS is present in the liver and examines its regulation in the bile duct-ligation model of hepatic fibrogenesis.Sham-operated and bile duct-ligated (BDL) Sprague-Dawley rats were studied. Gene and protein expression of hepatic renin, angiotensinogen, angiotensin-converting enzyme (ACE), and the angiotensin receptors AT1 and AT2 were assessed using real-time reverse-transcription polymerase chain reaction, in vitro autoradiography, and immunohistochemistry.Angiotensinogen and renin messenger RNA were detected in sham liver but were not increased following BDL. Angiotensinogen protein was widely distributed in hepatocytes in both normal and injured livers, but in BDL livers, it was also expressed within areas of active fibrogenesis. Both ACE and AT1 receptor genes were up-regulated following BDL. The low level of ACE activity in sham animals was significantly increased in areas of active fibrogenesis in BDL livers. The AT1 receptor was present in both normal and diseased liver parenchyma, with increased AT1 receptor binding seen in fibrotic areas in the diseased liver. The AT2 receptor gene was not detected in normal or diseased liver.Key elements of the RAS are present in normal liver tissue, and there is major up-regulation of the system in the bile duct-ligated liver. These findings are in keeping with recent experimental studies that have demonstrated antifibrotic effects of RAS blockade in the bile duct-ligated liver.en_US
dc.language.isoenen
dc.subject.otherAnimalsen
dc.subject.otherAutoradiographyen
dc.subject.otherBile Ductsen
dc.subject.otherComputer Systemsen
dc.subject.otherLigationen
dc.subject.otherLiver.metabolism.pathologyen
dc.subject.otherLiver Cirrhosis.etiology.metabolism.pathologyen
dc.subject.otherMaleen
dc.subject.otherRatsen
dc.subject.otherRats, Sprague-Dawleyen
dc.subject.otherRenin-Angiotensin System.physiologyen
dc.subject.otherReverse Transcriptase Polymerase Chain Reactionen
dc.subject.otherUp-Regulationen
dc.titleUp-regulation of components of the renin-angiotensin system in the bile duct-ligated rat liver.en_US
dc.typeJournal Articleen_US
dc.identifier.journaltitleGastroenterologyen_US
dc.identifier.affiliationMedicine (University of Melbourne)en_US
dc.description.pages1667-76en
dc.relation.urlhttps://pubmed.ncbi.nlm.nih.gov/12404241en
dc.type.contentTexten_US
dc.type.austinJournal Articleen
local.name.researcherAngus, Peter W
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairetypeJournal Article-
crisitem.author.deptCardiology-
crisitem.author.deptGeneral Medicine-
crisitem.author.deptMedicine (University of Melbourne)-
crisitem.author.deptVictorian Liver Transplant Unit-
crisitem.author.deptGastroenterology and Hepatology-
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